View Compilation Error

0_0_20707082_9156.cpp: In function 'void build(int, int, int)':
0_0_20707082_9156.cpp:28:16: error: 'm1' was not declared in this scope
     if (l==r) {m1[x]=as[x]=al[x]=ar[x]=sm[x]=a[l];return;}
                ^
0_0_20707082_9156.cpp: In function 'void modify1(int, int, int, int, long long int)':
0_0_20707082_9156.cpp:34:16: error: 'm1' was not declared in this scope
     if (l==r) {m1[x]=as[x]=al[x]=ar[x]=sm[x]=val;return;}
                ^